 | NIST Physical Reference Data and Online Reference Databases |
| Table of Elements at Berkeley, USA; and Sheffield, UK. Chemicool at MIT |
| NIST Atomic data bank |
| Electron Binding Energies |
| X-Ray Data |
| Crystallography World Wide |
| Chemical Information: NIST Chemistry WebBook, Chemfinder |
| Table of Nuclides |
Collision Data
| Stopping Power of Light Ions |
| K-Shell Ionization Cross Sections by Light Ions |
| Electron scattering |